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GB 55036-2022: Code of design for sprinkler systems
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| GB 55036-2022 | English | 1539 |
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Code of design for sprinkler systems
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GB 55036-2022
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Basic data | Standard ID | GB 55036-2022 (GB55036-2022) | | Description (Translated English) | Code of design for sprinkler systems | | Sector / Industry | National Standard | | Classification of Chinese Standard | P16 | | Word Count Estimation | 76,71 | | Date of Issue | 2022-07-15 | | Date of Implementation | 2023-03-01 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation | GB 55036-2022: Code of design for sprinkler systems---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
3 For the temporary high-pressure fire water supply system that adopts the high-level fire water tank to stabilize the pressure, it shall be the sum of the pressure at zero flow of the fire water pump and the maximum static pressure of the fire water pump suction port;
4 For the temporary high-pressure fire-fighting water supply system that uses a stabilized pressure pump to stabilize the pressure, it shall be the sum of the water pressure at zero flow rate of the fire-fighting water pump and the maximum static pressure of the suction port of the fire-fighting water pump, and the pressure of the stabilized-pressure pump when maintaining the pressure of the fire-fighting water supply system. the larger value of the one.
3.0.3 For the municipal water supply pipe network with municipal fire hydrants, the normal operating pressure should be greater than or equal to 0.14MPa. Greater than or equal to 0.10MPa.
3.0.4 The outdoor fire hydrant system shall meet the following requirements.
1.The distance between the outdoor fire hydrants and the distance between the outdoor fire hydrants and the outer walls, outer edges and road curbs of buildings (structures) shall meet the requirements of fire trucks for safety and convenience in taking and supplying water during fire rescue;
2 When the outdoor fire water supply pipe of the outdoor fire hydrant system is provided with a backflow preventer, an additional outdoor fire hydrant shall be installed in front of the backflow preventer;
3 The flow rate of the outdoor fire hydrant shall meet the requirements of the corresponding building (structure) for fire extinguishing, fire control, cooling and fire separation within the duration of the fire;
4 When the outdoor fire hydrant is directly used for fire extinguishing and the design flow rate of the outdoor fire water supply is greater than 30L/s, a high-pressure or temporary high-pressure fire water supply system shall be used.
3.0.5 The indoor fire hydrant system shall meet the following requirements.
1 The flow rate and pressure of the indoor fire hydrant shall meet the fire extinguishing and fire control requirements of the corresponding buildings (structures) within the duration of the fire;
2 The ring-shaped fire water supply pipeline shall have at least two water inlet pipes connected to the outdoor water supply pipe network. When one of the water inlet pipes is closed, the remaining water inlet pipes shall still be able to ensure all indoor fire water consumption;
3 In the place where indoor fire hydrants are installed, fire hydrants shall be installed on all floors including the equipment floor;
4 The setting of indoor fire hydrants shall be convenient for use and maintenance.
3.0.6 When the indoor fire water supply system is directly supplied by the pipe network of domestic and production water supply systems, measures to prevent backflow shall be taken at the inlet pipes. When a backflow preventer with an air partition is used, the backflow preventer should be installed in a clean and hygienic place, and measures should be taken to prevent its drain from being submerged in water.
3.0.7 The fire water source shall meet the following requirements.
1 The water quality shall meet the functional requirements of water-based fire-fighting facilities;
2 The water volume shall meet the maximum water consumption requirements of the water-based fire-fighting facilities within the design continuous water supply time;
3 The fire-fighting pool for fire-fighting vehicles and the natural water bodies, wells or artificial pools, water towers, etc. used as fire-fighting water sources shall take technical measures to ensure the safety of water-taking and passage of fire-fighting vehicles. The maximum water-absorbing height of fire-fighting vehicles shall meet the requirements Water absorption requirements.
3.0.8 The fire pool shall meet the following requirements.
1 The effective volume of the fire-fighting pool shall meet the fire-fighting water consumption requirements within the design continuous water supply time. When the fire-fighting pool adopts two-way fire-fighting water supply and the continuous replenishment of water in a fire can meet the fire-fighting water consumption requirements, if only the indoor fire hydrant system is installed, the effective volume should be greater than or equal to 50m³; in other cases, it should be greater than or equal to 100m³;
2 For pools where fire-fighting water is shared with other water, technical measures shall be taken to ensure that the fire-fighting water in the pool is not used for other purposes;
3 The outlet pipe of the fire pool shall ensure that the water in the effective volume of the fire pool can be fully utilized, and the minimum effective water level of the pool or the submersion depth of the suction port of the fire water pump shall meet the requirements for the safe operation of the fire water pump at the minimum water level and the realization of the designed water output;
4 The water level of the fire-fighting pool shall be displayed locally and in the fire-fighting control room, and the fire-fighting pool shall be equipped with high and low water level alarm devices;
5 The fire pool shall be provided with overflow pipes and drainage facilities, and indirect drainage shall be adopted.
3.0.9 For high-rise civil buildings and other public buildings with a total building area of 3 floors or above greater than 10,000m², when a temporary high-pressure fire-fighting water supply system is used indoors, high-level fire-fighting water tanks shall be installed.
3.0.10 The high level fire water tank shall meet the following requirements.
1 The effective volume and pressure of the high-level fire water tank of the indoor temporary high-pressure fire water supply system shall be able to ensure the water volume required for initial fire extinguishing;
2 The manholes of the open-air high-level fire water tanks on the roof and the valves of the water inlet and outlet pipes shall take protective measures to prevent them from being closed at will;
3 When setting up a high-level water tank room, the ambient temperature or water temperature in the water tank room should not be lower than 5°C;
4 The minimum effective water level of the high level fire water tank shall be able to prevent the water outlet pipe from entering.
3.0.11 The fire pump shall meet the following requirements.
1.The fire pump shall be started in time in case of fire; the stop of the pump shall be controlled manually and shall not stop automatically.
2 The performance of the fire water pump shall meet the required flow and pressure requirements of the fire water supply system.
3.The power of the driver equipped with the fire pump shall meet the requirements of the power required for operation at any point on the performance curve of the selected pump’s flow and lift.
4 The fire water pump shall adopt self-priming water suction. The fire pump that directly absorbs water from the municipal water supply pipe network shall be provided with an air-block backflow preventer on its outlet pipe.
5 The diesel engine fire water pump shall have the performance of continuous operation, and its emergency power supply shall meet the requirements of automatic start-up of the fire water pump at any time and continuous operation within the design continuous water supply time.
3.0.12 The fire water pump control cabinet shall be located in the fire water pump control room or fire water pump room, and its performance shall meet the following requirements.
1 When the fire water pump control cabinet is located in the fire water pump control room, its protection level shall not be lower than IP30; when it is located in the fire water pump room, its protection level shall not be lower than IP55.
2.The fire water pump control cabinet shall keep the fire water pump in the state of automatic start-up in normal times.
3 The fire pump control cabinet shall have the function of mechanical emergency starting of the pump, and when the mechanical emergency pump is started, the fire water pump shall be able to enter the normal operation state within 5 minutes after receiving the fire alarm.
3.0.13 The nominal flow rate of the pressure stabilizing pump should not be less than the normal leakage of the fire water supply system pipe network, and should be less than the automatic start-up flow of the system, and the nominal pressure should meet the requirements of the automatic start-up of the system and the filling of the pipe network with water.
4 automatic sprinkler system
4.0.1 The system type selection, water spraying intensity, action area, continuous spraying time and other parameters of the automatic sprinkler system shall be compatible with the fire characteristics of the protected object, fire hazard level, indoor clearance height and storage height, etc.
4.0.2 The type selection of automatic sprinkler system shall meet the following requirements.
1 Warehouses and similar places where early suppression and quick response nozzles are installed, and places where the ambient temperature is higher than or equal to 4°C and lower than or equal to 70°C, shall adopt a wet system.
2 Where the ambient temperature is lower than 4°C or higher than 70°C, a dry system should be used.
3 Where the dry system is replaced, or when the system is in a quasi-working state, it is strictly prohibited to spray by mistake or to fill the pipeline with water, the pre-action system should be used.
4 The deluge system shall be adopted in the places or parts with one of the following conditions.
1) The fire spreads quickly, and the opening of the closed nozzle cannot make the spray water effectively cover the fire area or parts in time;
2) The indoor clearance height exceeds the application height of the closed system, and the place or part where the initial fire must be quickly extinguished;
3) Severe hazard level II places.
4.0.3 The spraying intensity and effective area of the automatic sprinkler system shall meet the requirements for fire extinguishing, fire control, protective cooling or fire separation.
4.0.4 The continuous spraying time of the automatic sprinkler system shall meet the following requirements.
1 When used for fire extinguishing, it should be greater than or equal to 1.0h, and for local application systems, it should be greater than or equal to 0.5h;
2 When it is used for protective cooling, it shall be greater than or equal to the fire cooling time required by the design;
3 When used for fire separation, it should be greater than or equal to the design fire resistance time of the fire separation.
4.0.5 Sprinklers shall meet the following requirements.
1 The nozzle spacing should meet the requirements of effective water spraying and full coverage of combustibles or protected objects;
2.There should be no obstacles around the nozzle that block or affect the sprinkling effect;
3 The working pressure of the sprinkler at the most unfavorable point in hydraulic calculation of the system should be greater than or equal to 0.05MPa;
4 For nozzles in corrosive places and places prone to dust, fibers, etc., measures should be taken to prevent nozzle clogging;
5 For public buildings with a building height greater than 100m, the automatic sprinkler system installed in the high-rise main body shall adopt quick-response sprinklers;
6 Topical application systems should use quick-response applicators.
4.0.6 The most unfavorable point of the hydraulic calculation of the water supply pipe network controlled by each alarm valve group shall be equipped with terminal water testing devices, and other fire compartments and floors shall be equipped with DN25 water testing valves. The water testing device at the end shall have a pressure display function and shall be provided with corresponding drainage facilities.
4.0.7 The control valve used for the circular water supply pipe network of the automatic sprinkler system and the inlet and outlet of the alarm valve shall be a signal valve or have measures to ensure that the valve position is in a normally open state.
5 foam fire extinguishing system
5.0.1 The working pressure of the foam fire extinguishing system, the supply intensity and continuous supply time of the foam mixture shall meet the requirements for effective fire extinguishing or fire control.
5.0.2 The foam liquid used in the protective place shall be compatible with the type of fire extinguishing system, the nature of the combustibles to be extinguished, the quality of water supply, etc., and shall meet the following requirements.
1 For the fixed low-expansion foam fire extinguishing system used to extinguish the fire of non-water-soluble flammable liquid storage tanks, fluoroprotein or aqueous film-forming foam liquid should be used;
2.The low-expansion foam fire extinguishing system used to extinguish water-soluble and flammable liquid fires that have a destructive effect on ordinary foams should use water-resistant film-forming, fluoroprotein-resistant or low-viscosity fluoroprotein-resistant foams;
3 Foam-water spray systems, foam gun systems, and foam monitor systems that use non-aspiration spray devices to extinguish fires involving non-water-soluble flammable liquids should use 3% aqueous film-forming foam liquid;
4 When seawater is used as the system water source, the foam solution suitable for seawater should be used.
5.0.3 The type of low-expansion foam fire extinguishing system for storage tanks shall meet the following requirements.
1 For water-soluble flammable liquids and flammable liquids with a destructive effect on ordinary foam fixed-roof storage tanks, the liquid injection system shall be used;
2 For storage tanks with external floating roof and internal floating roof, it shall be the top-spraying system;
3 For external floating roof storage tanks and internal floating roof storage tanks for non-water-soluble combustible liquids, fixed-roof storage tanks for non-water-soluble combustible liquids with a diameter greater than 18m, and vertical storage tanks for water-soluble combustible liquids, when foam Guns should be auxiliary fire-fighting facilities;
4 For fixed-roof storage tanks with a height greater than 7m or a diameter greater than 9m, when foam guns are provided, the foam guns shall be auxiliary fire extinguishing facilities.
5.0.4 The design dosage of the foam mixture liquid for the low-expansion foam fire extinguishing system of the storage tank or the storage tank area to extinguish a fire shall be greater than or equal to the sum of the dosage in the tank, the dosage of the auxiliary foam gun of the tank, and the remaining amount of the pipeline. The amount of foam mixture required for the tank.
5.0.5 For the fire extinguishing system of low-expansion liquid jet foam for fixed-roof storage tanks, each foam generator shall be provided with an independent mixed liquid pipe leading to the fire bank. Except for the riser, other foam mixed liquid pipes shall not be arranged on the tank wall. superior.
5.0.6 For the fixed low-expansion foam fire extinguishing system of the storage tank or storage tank area, the time from the start of the foam fire pump to the delivery of the foam mixture or foam to the protected object should be less than or equal to 5 minutes. When foam stations are set up in storage tanks or storage tank farms, the foam stations shall meet the following requirements.
1 The fire resistance rating of the indoor foam station shall not be lower than Class II;
2 Foam stations are strictly prohibited to be installed in fire dikes, cofferdams, foam fire extinguishing system protection areas or other fire and explosion hazard areas;
3 The foam station set near the fire embankment shall have remote control function, and the horizontal distance from the tank wall of the flammable liquid storage tank shall be greater than or equal to 20m.
5.0.7 The protection area of medium or high expansion total flooding foam fire extinguishing system shall meet the following requirements.
1 It shall be a closed area or an area with a fixed enclosure, and the foam enclosure shall have the performance of preventing foam loss within the designed fire extinguishing time;
2 The foam loss caused by the unclosed opening on the enclosure shall be compensated in the foam liquid volume of the system;
3 An air outlet shall be provided in the closed protective area utilizing external air for foaming, and the location of the air outlet shall prevent combustion products or other harmful gases from flowing back into the air inlet of the foam generator.
5.0.8 For the medium-expansion or high-expansion foam fire extinguishing system, the total flooding system shall have automatic control, manual control and mechanical emergency operation starting methods, and the fixed local application system with automatic control shall have manual and mechanical emergency operation starting methods. Manually controlled stationary local application systems shall have means of activation for mechanical emergency operation.
5.0.9 The working pressure and flow rate of the foam liquid pump should meet the design requirements of the foam fire extinguishing system, and at the same time, it should be ensured that the foam liquid supply pressure is greater than the water supply pressure within the design flow range.
6 Water spray, fine water mist fire extinguishing system
6.0.1 The working pressure, supply intensity, continuous supply time and response time of the water spray fire extinguishing system and fine water mist fire extinguishing system shall meet the requirements of the system for effective fire extinguishing, fire control, protective cooling or fire separation.
6.0.2 The water quantity and water quality of the water spray fire extinguishing system and water mist fire extinguishing system shall meet the requirements of system fire extinguishing, fire control, protective cooling or fire separation, reliable operation and continuous spraying.
6.0.3 The pipes of water spray fire extinguishing system and fine water mist fire extinguishing system shall be metal pipes with corresponding corrosion resistance.
6.0.4 Automatically controlled water spray fire extinguishing system and fine water mist fire extinguishing system should have automatic control, manual control and mechanical emergency operation starting methods.
6.0.5 The water mist nozzles of the water mist fire extinguishing system shall meet the following requirements.
1.The water mist should be able to spray directly and cover the protection object;
2 The distance to the protected object should be less than or equal to the effective range of the water mist nozzle;
3 When used in electrical fire places, it should be a centrifugal atomization water mist nozzle;
4 The working pressure of the water mist nozzle should be greater than or equal to 0.35MPa when it is used for fire extinguishing; it should be greater than or equal to 0.15MPa when it is used for protective cooling.
6.0.6 The water mist nozzles of the water mist fire extinguishing system shall meet the following requirements.
1 It should be ensured that the fine water mist is sprayed evenly and completely covers the protected area;
2.The distance from the blocking object should be able to ensure that the blocking object does not affect the normal spraying of fine water mist by the nozzle, and compensation measures should be taken if it cannot be guaranteed;
3 For places where the use environment may block the nozzle, the nozzle should take corresponding protective measures.
6.0.7 The continuous spraying time of the fine water mist fire extinguishing system shall meet the following requirements.
1 For electronic and electrical equipment rooms such as electronic information system computer rooms and power distribution rooms, library libraries, databases, archives, cultural relics libraries, cable tunnels and cable interlayers, etc., it should be greater than or equal to 30 minutes;
2 For oil-immersed transformer room, turbine room, diesel generator room, hydraulic station, lubricating oil station, oil-fired boiler room and other mechanical equipment rooms containing flammable liquids, it should be greater than or equal to 20 minutes;
3 For the fire in the cooking equipment and its exhaust hood and exhaust pipe in the kitchen, the fire shall be greater than or equal to 15s, and the continuous spraying time of cooling water shall be greater than or equal to 15min.
6.0.8 The material of the filter in the water mist fire extinguishing system shall be stainless steel, copper alloy, or other metal materials with corrosion resistance not lower than stainless steel or copper alloy. The ratio of the mesh aperture of the filter to the minimum nozzle aperture of the nozzle should be less than or equal to 0.8.
7 Fixed fire monitors, automatic tracking and positioning jet fire extinguishing system
7.0.1 The types and fire extinguishing agents of fixed fire monitors and automatic tracking and positioning jet fire extinguishing systems shall meet the requirements for extinguishing and controlling the fires of protected objects. or explosive fire.
7.0.2 The indoor fixed water monitor fire extinguishing system shall adopt a wet water supply system, and the start button of the fire pump shall be set at the installation place of the fire monitor. Temporary high-pressure firefighting water supply systems that supply water monitors and foam monitor fire suppression systems shall have automatic activation.
7.0.3 The installation of indoor fixed fire monitors shall ensure that the jet stream of fire monitors is not blocked by building structures or facilities.
7.0.4 Outdoor fixed fire monitors shall meet the following requirements.
1 The jet stream of the fire monitor should completely cover the protected place and the protected object, and its jet intensity should meet the requirements for fire extinguishing or cooling;
2 Fire monitors should be installed on the upwind side of the perennial dominant wind direction of the protected place;
3 Lightning protection measures should be taken for the turret, and protective railings and protective water curtains should be installed. The total flow rate of the protective water curtain should be greater than or equal to 6L/s.
7.0.5 The fixed fire monitor platform and turret should have corrosion resistance or anti-corrosion measures suitable for the environmental conditions, and its structure should be able to withstand the jetting reaction force of the fire monitor and the maximum wind force at the place of use at the same time, meeting the requirements for the normal operation of the fire monitor.
7.0.6 The time for fixed water monitor and foam monitor fire extinguishing system to spray water or foam from the nozzle should be less than or equal to 5 minutes, and the time for fixed dry powder monitor fire extinguishing system to spray dry powder from the nozzle should be less than or equal to 2 minutes.
7.0.7 The water monitor range, supply intensity, flow rate, continuous water supply time, etc. of the fixed water monitor fire extinguishing system shall meet the following requirements.
1 The continuous supply time of fire extinguishing water shall be greater than or equal to 1.0h for indoor fires and greater than or equal to 2.0h for outdoor fires.
2 The supply intensity of fire extinguishing and cooling water shall meet the requirements of completely covering the protected area and fire extinguishing and fire control.
3 The total flow rate of the water monitor fire extinguishing system shall be greater than or equal to the greater value of the sum of the flow rates of the water monitors that need to be turned on simultaneously in the system, the sum of the calculated total flow rate of fire extinguishing water and the calculated total flow rate of cooling water.
7.0.8 The foam mixture flow rate and foam liquid storage capacity of the fixed foam monitor fire extinguishing system shall meet the following requirements.
1 The total flow rate of the foam mixture should be greater than or equal to the greater value of the sum of the flow rates of the foam monitors that need to be opened simultaneously in the system, and the product of the fire extinguishing area and the supply intensity;
2 The total storage capacity of the foam solution shall be greater than or equal to 1.2 times of its calculated total volume;
3 The foam proportional mixing device should have the function of automatically controlling the mixing ratio within the specified flow range.
7.0.9 The dry powder storage capacity and continuous supply time of the fixed dry powder monitor fire extinguishing system shall meet the following requirements.
1 The continuous supply time of dry powder should be greater than or equal to 60s;
2 The total amount of storage of dry powder should be greater than or equal to 1.2 times of its calculated total amount;
3 The dry powder storage tank shall be a pressure storage tank and shall meet the requirements for safe use at the highest operating temperature;
4 The dry powder driving device shall be a high-pressure nitrogen cylinder group, and the rated filling pressure of the nitrogen cylinder shall be greater than or equal to 15MPa;
5 The dry powder storage tank and the nitrogen drive bottle should be set separately.
7.0.10 The valves in the fixed fire monitor fire extinguishing system shall be provided with working position locking devices and obvious indication signs.
7.0.11 The automatic tracking and positioning jet fire extinguishing system shall meet the following requirements.
1 The flow rate of a single monitor in the automatic fire monitor fire extinguishing system shall not be less than 20L/s for civil buildings, and shall not be less than 30L/s for industrial buildings.
2 The continuous water spraying time should not be less than 1.0h.
3.The system shall have automatic control, manual control in the fire control room and start-up methods of on-site manual control. Manual control in the fire control room and on-site manual control shall have priority over automatic control.
4 When the automatic fire monitor fire extinguishing system and the spray type automatic jet fire extinguishing system are under automatic control, when a fire source is detected, at least 2 fire extinguishing devices shall scan and locate the fire source and at least 1 and at most 2 fire extinguishing devices shall be automatically activated jet, and the jet should be able to reach the source of ignition.
5 When the sprinkler type automatic jet fire extinguishing system is under automatic control, when a fire source is detected, the fire extinguishing device corresponding to the fire source detection device shall automatically start the jet, and the jet of at least one group of fire extinguishing devices shall reach the fire source.
8 gas fire extinguishing system
8.0.1 Total flooding carbon dioxide fire extinguishing system should not be used in places where people often stay.
8.0.2 The protection zone of the total flooding gas fire extinguishing system shall meet the following requirements.
1 The overpressure resistance performance of the enclosure structure of the protection zone shall meet the requirements of maintaining the integrity of the enclosure structure during the fire extinguishing agent release and design immersion time;
2 The airtight performance of the enclosure structure of the protected area shall meet the requirements of keeping the fire extinguishing agent concentration in the protected area not lower than the designed fire extinguishing concentration or design inerting concentration within the design immersion time of the fire extinguishing agent;
3 The door of the protected area should face the evacuation direction.
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